/*
 * Copyright 2011-2022 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.lettuce.core.event.metrics;

import io.lettuce.core.event.Event;

/**
 * Event publisher which publishes metrics by the use of {@link Event events}.
 *
 * @author Mark Paluch
 * @since 3.4
 */
public interface MetricEventPublisher {

    /**
     * Emit immediately a metrics event.
     */
    void emitMetricsEvent();

    /**
     * Returns {@code true} if the metric collector is enabled.
     *
     * @return {@code true} if the metric collector is enabled
     */
    boolean isEnabled();

    /**
     * Shut down the event publisher.
     */
    void shutdown();

}
